Method for preparing synthesis gas through catalytic reforming of methane and carbon dioxide

A carbon dioxide and catalytic reforming technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of narrow temperature range and high reaction temperature of methane dry reforming , Yiji carbon deposition and other problems, to achieve the effect of wide reaction temperature range and pressure range

Active Publication Date: 2017-01-04
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of low activity, easy carbon deposition and poor stability of the catalyst for carbon dioxide reforming of methane, as well as the problems of high reaction temperat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Catalyst 10%U-10%Ni / Al 2 o 3 preparation of

[0036] First prepare a mixed solution containing uranium as the main active component and nickel as the secondary active component, and weigh uranyl sulfate and nickel sulfate solution according to the mass percentage of the main active metal component uranium and the secondary active metal component in the catalyst. In deionized water, dubbed dipping solution. Then weigh 5.0g of Al 2 o 3 The carrier is impregnated in the prepared impregnation solution, impregnated at room temperature for 24 hours, dried at 120°C for 4 hours, and then calcined at 600°C for 3 hours to obtain a catalyst for methane carbon dioxide catalytic reforming 10%U-10%Ni / Al 2 o 3 .

[0037] (2) Activity evaluation of the catalyst

[0038] Weigh 0.1g catalyst 10%U-10%Ni / Al 2 o 3 Put it into a tubular fixed-bed reactor for catalytic reforming of methane and carbon dioxide, feed hydrogen at 10ml / min under normal pressure, program temperature ri...

Embodiment 2

[0045] (1) Catalyst 0.05%U-0.01%Tu-10%Ni / Al 2 o 3 preparation of

[0046] First prepare a mixed solution containing uranium as the main active component and thorium and nickel as the secondary active components, and weigh uranyl nitrate and nitric acid according to the mass percentages of uranium and secondary active metal components in the catalyst. Thorium and nickel nitrate are dissolved in ethanol to make an impregnation solution. Then weigh 5.0g of Al 2 o 3 The carrier is immersed in the prepared impregnation solution, immersed at room temperature for 12 hours, dried at 60°C for 24 hours, and then calcined at 350°C for 24 hours to obtain a catalyst for catalytic reforming of methane carbon dioxide 0.05%U-0.01%Tu-10%Ni / Al 2 o 3 .

[0047] (2) Activity evaluation of the catalyst

[0048] Weigh 0.1g catalyst 0.05%U-0.01%Tu-10%Ni / Al 2 o 3 Put it into a tubular fixed-bed reactor for catalytic reforming of methane and carbon dioxide, feed hydrogen and argon mixed gas (...

Embodiment 3

[0050] (1) Catalyst 30%U-5%Ni-0.5%Pt / Al 2 o 3 -CeO 2 preparation of

[0051] First prepare a mixed solution containing uranium as the main active component and nickel and platinum as the secondary active components, and weigh uranyl nitrate and nitric acid Nickel and chloroplatinic acid are dissolved in acetone to form an impregnating solution. Then weigh 5.0g of Al 2 o 3 -CeO 2 The carrier is impregnated in the prepared impregnation solution, impregnated at room temperature for 1h, dried at 60°C for 24h, and then calcined at 450°C for 12h to obtain a catalyst for methane dry reforming 30%U-5%Ni-0.5%Pt / Al 2 o 3 -CeO 2 .

[0052] (2) Activity evaluation of the catalyst

[0053] Weigh 0.1g catalyst 30%U-5%Ni-0.5%Pt / Al 2 o 3 -CeO 2 Put it into a tubular fixed-bed reactor for catalytic reforming of methane and carbon dioxide, feed hydrogen-nitrogen mixed gas (20% v / v) 10ml / min under normal pressure, program temperature rise to 300°C, reduce for 24h, then program tempe...

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PUM

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Abstract

The invention discloses a method for preparing synthesis gas through catalytic reforming of methane and carbon dioxide and belongs to the technical field of catalytic reactions. According to the method, a supported uranium-based multi-metal catalyst is taken as a catalyst for a reforming reaction of methane and carbon dioxide. The catalyst is prepared from a primary reactive metal component, namely, uranium, secondary reactive metal components and a carrier, wherein the content of uranium in the catalyst is 0.05%-30% by mass, the secondary reactive metal components comprise one or more of thorium, nickel, cobalt, molybdenum, palladium, platinum, ruthenium, rhodium and iridium, and the content of the secondary reactive metal components in the catalyst is 0.01%-20% by mass; the carrier is one of a carbon carrier, inorganic oxide and molecular sieves or a mixed carrier of more of the carbon carrier, inorganic oxide and the molecular sieves. The pressure for the reforming reaction of methane and carbon dioxide is 50 atm lower than the normal pressure, and the reaction temperature is 450-950 DEG C. The method for preparing the synthesis gas through catalytic reforming of methane and carbon dioxide has the advantages of wide reaction temperature range, high catalyst activity, good stability, carbon deposition resistance and the like.

Description

technical field [0001] The invention relates to a method for preparing synthesis gas by catalytic reforming of methane and carbon dioxide, belonging to the technical field of catalytic reaction. Background technique [0002] Methane to synthesis gas is an important way and development direction for the development and utilization of methane resources (natural gas, combustible ice, mine coalbed methane, etc.). Among the three main processes (reactions 1-3) of methane to synthesis gas, methane carbon dioxide reforming reaction (also called methane dry reforming) product CO / H 2 The molar ratio is 1:1, which can be used as an ideal raw material for Fischer-Tropsch synthesis; and carbon dioxide is converted and utilized as a reactant, which makes full use of carbon dioxide, a cheap carbon source, and alleviates the emission of greenhouse gases, so methane carbon dioxide reforming Due to the above-mentioned advantages in resources, economy, environment, etc., it has attracted ext...

Claims

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Application Information

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IPC IPC(8): C10J1/20C01B3/40B01J23/63B01J23/755B01J23/883B01J23/89B01J29/03
CPCB01J23/63B01J23/755B01J23/883B01J23/894B01J29/03B01J29/0325C01B3/40C10J1/20Y02P20/52
Inventor 王来军
Owner TSINGHUA UNIV
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